Uxcell 8mm Dia Grip 50mm Dual Wheel Chair Ring Stem Rotatable Caster Product name : grip ring stem caster wheel; type : 360 degree rotation dual wheel Wheel size : 50 x 15Mm / 2"; x 0. 6"; (dt); total size (approx. ) : 59X 45 x 75Mm / 2. 3"; x 1. 8" x 3"(lwh) Lock stem dia. : 8Mm / 0. 3"; lock stem length : 15Mm / 0. 6" Material : plastic, metal; color : black Weight : 64G; package content : 1 x grip ring stem caster wheel